1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2005 Ivan Voras <ivoras@freebsd.org> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/param.h> 30 #include <sys/endian.h> 31 32 #include <geom/virstor/g_virstor_md.h> 33 #include <geom/virstor/binstream.h> 34 35 /* 36 * Encode data from g_virstor_metadata structure into a endian-independent 37 * byte stream. 38 */ 39 void 40 virstor_metadata_encode(struct g_virstor_metadata *md, unsigned char *data) 41 { 42 bin_stream_t bs; 43 44 bs_open(&bs, data); 45 46 bs_write_buf(&bs, md->md_magic, sizeof(md->md_magic)); 47 bs_write_u32(&bs, md->md_version); 48 bs_write_buf(&bs, md->md_name, sizeof(md->md_name)); 49 bs_write_u64(&bs, md->md_virsize); 50 bs_write_u32(&bs, md->md_chunk_size); 51 bs_write_u32(&bs, md->md_id); 52 bs_write_u16(&bs, md->md_count); 53 54 bs_write_buf(&bs, md->provider, sizeof(md->provider)); 55 bs_write_u16(&bs, md->no); 56 bs_write_u64(&bs, md->provsize); 57 bs_write_u32(&bs, md->chunk_count); 58 bs_write_u32(&bs, md->chunk_next); 59 bs_write_u16(&bs, md->chunk_reserved); 60 bs_write_u16(&bs, md->flags); 61 } 62 63 /* 64 * Decode data from endian-independent byte stream into g_virstor_metadata 65 * structure. 66 */ 67 void 68 virstor_metadata_decode(unsigned char *data, struct g_virstor_metadata *md) 69 { 70 bin_stream_t bs; 71 72 bs_open(&bs, (char *)(data)); 73 74 bs_read_buf(&bs, md->md_magic, sizeof(md->md_magic)); 75 md->md_version = bs_read_u32(&bs); 76 bs_read_buf(&bs, md->md_name, sizeof(md->md_name)); 77 md->md_virsize = bs_read_u64(&bs); 78 md->md_chunk_size = bs_read_u32(&bs); 79 md->md_id = bs_read_u32(&bs); 80 md->md_count = bs_read_u16(&bs); 81 82 bs_read_buf(&bs, md->provider, sizeof(md->provider)); 83 md->no = bs_read_u16(&bs); 84 md->provsize = bs_read_u64(&bs); 85 md->chunk_count = bs_read_u32(&bs); 86 md->chunk_next = bs_read_u32(&bs); 87 md->chunk_reserved = bs_read_u16(&bs); 88 md->flags = bs_read_u16(&bs); 89 } 90